An expression using an attribute, operator, and criteria used to sift
through data.

Impact

Raw change in conversion rate from control to variant.

Lift

Percentage better or worse a variant is compared to the control in an
experiment.

Metric Value (in CSV export)

The metric value column in the exported results CSV file represents
the value of the computed metric you selected. For instance, if you are
measuring conversion rate of purchases as a goal, the metric value
column shows the conversion rate calculated.

Number of Sessions

Number of sessions is how many foreground-to-background transitions that we
see.

Occurrences

Number of times the goal event was triggered.

Occurrences per user

Average number of occurrences per participant.

Participant

A user in an experiment’s population who has seen a variant. We determine
this by whether the mobile devices runs the code that determines variant
treatment.

Population (Enrolled)

Apptimize bucketed the user into the experiment and one of its variants or control.
This means that the user met the filtering requirements and were randomly selected
according to your allocation. Some users will be enrolled but
never “Participate” in a variant because they don’t navigate to the part of the app that
contains the experiment.

Retention

The number of users who have a second session- open the app at least a
second time, in a given period of time.

Screens Viewed per Session

On Android this is the number of activities, popups, and fragments we
measure during a session. On iOS it is the number of view controllers shown
that we measure per session. Note that since this is how we measure screens
view, it’s possible given how differently apps are designed that we
overcount the number of screens viewed, however since in an experiment
you’re measuring versus a control this doesn’t adversely affect your
experiment results.

Session

A session is when a user is in your app, specifically measured by the time
between when your app is foregrounded to when the app is backgrounded.

Session Interval

The session interval is time between consecutive sessions, specifically the
time between when the app is backgrounded to when it is next foregrounded by
a user.

Session Length

Session length is measured by the length of time between a foreground and a
background.

Significance

Standard method for statistical significance by confidence. Statistical
significance is the probability that the difference in the goal metric
between variant and control is not due to random chance. P value equals
1 minus statistical significance.